Preheat oven to 375 degrees F and get two baking sheets out. I line mine with parchment paper but that is optional.
Cut the tough rib off the back of the kale leaf by holding the leaf on its side, holding the two halves of the curly part together and slice the rib off the length of the leaf.
Cut or tear the large leaf into pieces.
Wash the leaves and then dry them in a salad spinner or with paper towel.
Put the dry, washed leaves in a large bowl and toss them with the olive oil to coat.
Sprinkle them with salt to your taste and toss to make sure they all have oil and salt.
Spread them onto the baking sheets and bake at 375 degrees F for 10-12 minutes.
After 10 minutes take the pans out of the oven and put the crispy pieces in a bowl to serve. Check all of the pieces and any that have soft spots still, turn them over and place them back in the oven for another 3 minutes. You will want to make sure that the whole piece of kale is crispy. Repeat this until all the pieces are crispy - remove fully crisp and put soft ones back in the oven.